CoinPayments is a cloud wallet solution that offers an easy way to integrate a checkout system for numerous cryptocurrencies. Coinpayments now also offers coin conversion via Shapeshift.io.
Extensible SI unit creation, conversions, quantities & calculations (incl. Lisp-like DSL and ~170 predefined units & constants)
A pure and powerful JavaScript Resistance library.
A JavaScript library for parameter extraction of the Five-Parameter Diode Model. Calculates Vth (Threshold Voltage), Rsh (Shunt Resistance), Rs (Series Resistance), Io (Saturation Current), and n (Ideality Factor).